A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 4140-01-595-5285
NSN 6240-00-287-1988
NSN 5960-00-822-2157
NSN 6130-01-655-4264
NSN 5920-00-669-8984
NSN 5965-00-226-2915
NSN 6320-01-185-3857
NSN 6135-01-222-0703
NSN 6220-01-265-2705
NSN 6105-01-392-4222
NSN 5925-01-249-4555
NSN 6130-01-445-4237